Cozy Heat OG Thru-Wall Sauna Stove
Cozy Heat OG Thru-Wall Sauna Stove
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Why Buy From Us ?
Why Buy From Us ?
Unmatched Quality and Craftsmanship:
At Aurora Sanctuary, we pride ourselves on delivering unparalleled quality and craftsmanship in every Seraphic Spa product we offer. Sourced from the world's finest manufacturers, our saunas, massage chairs, and baths are meticulously crafted masterpieces designed to provide ultimate relaxation and rejuvenation. Our commitment to quality ensures that each item in our collection meets rigorous standards of durability, functionality, and aesthetic appeal.
Tailored Solutions and Exceptional Service:
Understanding that wellness is a personal journey, we offer tailored solutions to meet the unique needs of every customer. Whether you seek the therapeutic warmth of a sauna, the targeted relief of a massage chair, or the serene escape of a luxury bath, our diverse range of products guarantees a perfect match for your wellness objectives and lifestyle. Backed by exceptional customer service, our knowledgeable team guides you through every step, from initial consultation to after-sales support. With competitive pricing, flexible financing options, and comprehensive warranties, choosing Aurora Sanctuary ensures not only a Seraphic Spa experience but also peace of mind and a sense of belonging to our wellness family.
Returns & Refunds
Returns & Refunds
At Seraphic Spa, we stand by the quality of every product we sell. However, we understand that sometimes a product might not meet your expectations or suit your needs. That’s why we offer a 30-Day Return Policy to ensure your complete satisfaction.
If you decide to return an item for any reason within 30 days of receiving your order, please email us at support@seraphicspa.com with your order number. We’ll provide detailed instructions on how to process your return.
Wood-Burning Sauna Stove, Up to 18kW
The Cozy Heat OG TW is an authentic wood-burning sauna stove hand-made in Estonia with through-the-wall design, so the firebox can be filled from outside your sauna. Wood-fired sauna stoves create a mild and long-lasting heat. Designed for pouring water over hot stones for an intense steam and a more satisfying sauna experience.
- 12kW - for saunas from 210 to 423 cu.ft.
- 18kW - for saunas from 317 to 635 cu.ft.
Cozy Heat has taken the time-honored craft of building sauna stoves to a higher level. This wood-fired sauna stove is hand-made in Estonia, where sauna bathing is a national tradition.
The OG-TW's clever "Through-the-Wall" design lets you load firewood from outside your sauna. Wood-burning sauna stoves produce a mild and long-lasting heat and are designed for pouring water over hot stones to create your perfect amount of steam.
The part of the wood-burning heater that must be the strongest, the flame cutter, is made of sturdy, 5mm-thick stainless steel making COZY heaters extremely durable.
Cozy Heat's OG-TW model has an elegant and sophisticated trilateral design that is elegant and sophisticated, elevating the aesthetic appeal of your sauna. With its sleek lines and contemporary finish, this stove complements any sauna decor, creating a luxurious ambiance that beckons you.
Experience the pinnacle of comfort and sophistication with the Cozy Heat OG-TW!
Features
- Artistically inventive design
- Wood-burning
- Steel Construction
- Smoke gases are 6x cleaner
- German BIMSCH certificate
- Stove utilizes 25%-40% less fuel than comparable sauna stoves
- Boasts minimal safety distances
- Mild and long-lasting heat
- Floor mount thru-wall
- Sauna room sizes:
- 12kW - 210 to 423 cu.ft.
- 18kW - 317 to 635 cu.ft.
- Stone Requirements:
- 12kW - minimum of 265lbs of stones
-
18kW - minimum of 353lbs of stones
- Please note that each natural stone is unique in shape and size. We recommend purchasing an additional box of sauna stones to allow you to choose the highest quality of stone for fit, form, and function (Additional freight charges will apply).
- 2-Year Warranty
- Designed and engineered in Estonia
Includes
- Outer frame of the heater
- Chimney pipe
- Heater body
- Cleaning hatch
- Heater door with glass
- Ash box
- Installation and operation manual
- 2-Year Warranty
Specifications
Model |
Cozy OG Thru-Wall 12 |
Kilowatt Rating |
12kW |
Primary Fuel |
Wood |
Maximum Firewood Length |
2.99" (329mm) |
Diameter of Firewood |
3.14" to 4.72" (80mm-120mm) |
Minimum Cubic Feet |
210 Cu. Ft. |
Maximum Cubic Feet |
423 Cu. Ft. |
Minimum Room Height |
72" (1828mm) |
Flue Connection Location |
Top |
Heater Weight |
139 lbs |
Shipping Weight with Sauna Stones |
404 lbs |
Safety Distance Front to Back |
56.09" (1425mm) |
Safety Distance Left to Right |
34.05" (865mm) |
Stove Depth |
27.36" (695 mm) |
Stove Width |
19.60" (498 mm) |
Stove Height |
27.91" (709 mm) |
Technical
Installation and Operation Manual
Cozy Heat Manual 2024.pdf
Warranty
Cozy Heat Warranty.pdf





We are committed to providing unmatched quality and craftsmanship in all our products. From saunas to massage chairs, each item is meticulously crafted for ultimate relaxation, rejuvenation, and complete satisfaction.
At Seraphic Spa, we recognize that price isn't everything, but we also value fair deals. That's why we're committed to matching advertised prices for any product on our site, ensuring you never overpay and get the best value
At Seraphic Spa we offer flexible payment options, allowing you to pay over time for any product. Enjoy peace of mind knowing you can afford the items you want without financial strain, effortlessly and conveniently.
Customer satisfaction No.1 priority. Our products are backed by robust warranties, with each brand offering its own unique coverage. You have the option to purchase extended warranties for up to 5 years, ensuring added assurance and peace of mind.

Seraphic Spa
We dreams of a world where wellness is integral, offering innovative luxury for balanced living and trusted home relaxation. Explore Aurora Sanctuary, find products for your oasis, and transform your home into a luxury sanctuary of relaxation and wellbeing.

Saunas
Shop our high-end luxury saunas, transforming your space into a haven of relaxation..
- Indoor & Outdoor Models
- 1 to 8 Person Sizes



Saunas
Elevate Your Home Spa Experience
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Embrace The Therapeutic Benefits
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Embrace The Therapeutic Benefits
FAQ
Frequently asked Questions
What types of products does SeraphicSpa.com offer?
SeraphicSpa.com specializes in luxury home spa products, including state-of-the-art saunas, premium massage chairs, and artisan-crafted baths designed for unparalleled relaxation and wellness.
Are your saunas suitable for outdoor installation?
Yes, we offer a range of saunas designed specifically for outdoor use, crafted with durable materials to withstand various weather conditions while providing the ultimate spa experience.
How do I choose the right massage chair for my needs?
Our massage chairs come with various features tailored to different preferences. We recommend considering factors like space, desired massage techniques, and additional features such as heat therapy or zero-gravity positioning.
Can the baths be customized to fit specific dimensions?
Absolutely! Many of our baths can be customized to suit particular size requirements. Please contact us with your dimensions for more information on customization options.
Do you provide installation services for saunas and baths?
While we do not offer direct installation services, we partner with a network of skilled professionals across the country and would be happy to recommend a trusted installer in your area.
Are your products covered by a warranty?
Yes, all Aurora Sanctuary products come with a comprehensive manufacturer's warranty that covers defects in materials and workmanship. Please check the specific product page for detailed warranty information.
Do you offer financing options?
Yes, we understand the investment in luxury home spa products and offer financing options to help make your dream spa experience more accessible. Please visit our Financing page for more details.
what our customers say about us
4.8
1236
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Amelia F. 03/29/2024Verified BuyerQuality was goodQuality was good and very comfortable.Cozy Heat OG Thru-Wall Sauna Stove Was this helpful? 22 2
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Elijah E. 02/27/2024Verified BuyerI bought 2In expensive, easy to put together and looks cool, I bought 2Cozy Heat OG Thru-Wall Sauna Stove Was this helpful? 37 0
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Bexley K. 11/20/2024Verified BuyerdelightMy chair is a daily indulgence. It's like having a personal masseuse on standby. The heat therapy is a game-changer, especially during colder months. Can't imagine my evenings without itCozy Heat OG Thru-Wall Sauna Stove Was this helpful? 0 0
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William G. 01/18/2024Verified BuyerVery comfortableVery comfortable and the massager is a nice feature, my kiddo loves itCozy Heat OG Thru-Wall Sauna Stove Was this helpful? 3 0
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Mark D. 11/21/2023Verified BuyermvpThese chairs are the real MVPs. Great quality, stylish design, and my posture has never been better. No regrets on this purchase!Cozy Heat OG Thru-Wall Sauna Stove Was this helpful? 0 0
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Landon S. 03/24/2025Verified BuyerLove it!Super fast shipping, great quality, comfortable. Love it!Cozy Heat OG Thru-Wall Sauna Stove Was this helpful? 0 0
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Grace B. 12/04/2023Verified BuyerWorth every pennyMy husband and I work long stressful hours as medical professionals. We look forward to coming home and getting in our Osaki Massage chair to melt away the stress of our day. It is the best investment we’ve made for our peace of mind and our health. We absolutely love our massage chair.Cozy Heat OG Thru-Wall Sauna Stove Was this helpful? 51 4
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Amir K. 01/06/2025Verified BuyerVery RelaxingReally loving airbag massage from this chair. I had a back pain, and this chair relived the pain. Would I recommend this chair to my friends? Yes!Cozy Heat OG Thru-Wall Sauna Stove Was this helpful? 31 0
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Aria T. 04/26/2025Verified BuyerCompletely recommendSuper comfortable and easy to assemble. Completely recommend!!!Cozy Heat OG Thru-Wall Sauna Stove Was this helpful? 0 0